<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<table border="3">
    <caption>商品列表</caption>
    <tr>
        <th>商品名</th><!-- th 居中加粗-->
        <th>价格</th>
        <th>库存</th>
    </tr>

</table>
<script>
    //定义一个空的Person
    function Person() {}
    //实例化Person对象
    let p1 = new Person();
    //动态添加属性
    p1.name = "刘德华";p1.age = "50";
    //动态添加方法
    p1.run = function () {console.log(this.name+":"+this.age);}
    //调用对象的方法
    p1.run();
    //定义一个自带属性和方法的对象
    function Car() {
        this.name = "宾利";this.price = 500;
        this.run = function () {console.log(this.name+":"+this.price)}
    }
    let c1 = new Car();
    c1.run();
    //直接实例化空对象的方式
    let p2 = {};
    p2.name = "貂蝉";p2.age = 16;
    p2.run = function () {console.log(this.name+":"+this.age);}
    p2.run();
    //直接实例化带属性和带方法的对象
    let p3 = {
        name:"鲁班",age:18,
        run:function () {
            console.log(this.name+":"+this.age);
        }
    }
    p3.run();
    //将商品信息封装到一个对象中，在数组里面装多个表示商品信息的对象
    let arr = [{title:"小米手机",price:3000,num:1000},
               {title:"华为手机",price:6000,num:10000},
               {title:"中兴手机",price:1000,num:100}]
    let table = document.querySelector("table");
    //遍历数组
    for (let item of arr) {
        let tr = document.createElement("tr");
        let titleTd = document.createElement("td");
        let priceTd = document.createElement("td");
        let numTd = document.createElement("td");
        //给td添加显示的商品信息
        titleTd.innerText = item.title;
        priceTd.innerText = item.price;
        numTd.innerText = item.num
        tr.append(titleTd,priceTd,numTd);
        //把tr装进table
        table.append(tr);
    }



</script>
</body>
</html>